-void
-reference_manual (GtkMenuItem *menu, gpointer data)
-{
- GError *err = NULL;
- if ( ! g_spawn_command_line_async ("yelp info:pspp", &err) )
- {
- msg (ME, _("Cannot open reference manual: %s"), err->message);
- }
- g_clear_error (&err);
-}
-
-
-extern struct dataset *the_dataset;
-extern struct source_stream *the_source_stream;
-extern PsppireDataStore *the_data_store;
-
-/* Lazy casereader callback function used by execute_syntax. */
-static struct casereader *
-create_casereader_from_data_store (void *data_store_)
-{
- PsppireDataStore *data_store = data_store_;
- return psppire_data_store_get_reader (data_store);
-}
-
-gboolean
-execute_syntax (struct getl_interface *sss)
-{
- struct lexer *lexer;
- gboolean retval = TRUE;
-
- struct casereader *reader;
- size_t value_cnt;
- casenumber case_cnt;
- unsigned long int lazy_serial;
-
- /* When the user executes a number of snippets of syntax in a
- row, none of which read from the active file, the GUI becomes
- progressively less responsive. The reason is that each syntax
- execution encapsulates the active file data in another
- datasheet layer. The cumulative effect of having a number of
- layers of datasheets wastes time and space.
-
- To solve the problem, we use a "lazy casereader", a wrapper
- around the casereader obtained from the data store, that
- only actually instantiates that casereader when it is
- needed. If the data store casereader is never needed, then
- it is reused the next time syntax is run, without wrapping
- it in another layer. */
- value_cnt = psppire_data_store_get_value_count (the_data_store);
- case_cnt = psppire_data_store_get_case_count (the_data_store);
- reader = lazy_casereader_create (value_cnt, case_cnt,
- create_casereader_from_data_store,
- the_data_store, &lazy_serial);
- proc_set_active_file_data (the_dataset, reader);
-
- g_return_val_if_fail (proc_has_active_file (the_dataset), FALSE);
-
- lexer = lex_create (the_source_stream);
-
- getl_append_source (the_source_stream, sss, GETL_BATCH, ERRMODE_CONTINUE);
-
- for (;;)
- {
- enum cmd_result result = cmd_parse (lexer, the_dataset);
-
- if ( cmd_result_is_failure (result))
- {
- retval = FALSE;
- if ( source_stream_current_error_mode (the_source_stream)
- == ERRMODE_STOP )
- break;
- }
-
- if ( result == CMD_EOF || result == CMD_FINISH)
- break;
- }
-
- getl_abort_noninteractive (the_source_stream);
-
- lex_destroy (lexer);
-
- psppire_dict_replace_dictionary (the_data_store->dict,
- dataset_dict (the_dataset));
-
- reader = proc_extract_active_file_data (the_dataset);
- if (!lazy_casereader_destroy (reader, lazy_serial))
- psppire_data_store_set_reader (the_data_store, reader);
-
- som_flush ();
-
- psppire_output_window_reload ();
-
- return retval;
-}
-
-
-